5" co-axial ceiling speakers (pair) with a powerful bass-reflex design. It features a special diffuser for off-axis high-frequency response and wide-dispersion for music and paging applications. The speakers have a wide area of coverage with uniform sound output levels. Includes tile bridges for easy mounting. The unit has both low and high-impedance operating capabilities making it suitable for many different applications. Even after installation, the front-panel input selector switch makes it easy to change impedance settings.